In-Situ Repair of Multiple Cracks Present in the RTJ Groove of High Pressure Hydrogen Bearing DHDS Reactor by Welding

2012 ◽  
Vol 45 (2) ◽  
pp. 52
Author(s):  
Swapan Kumar Bagchi ◽  
Kaushik Boral ◽  
Amit Kumar Mishra
Keyword(s):  
High Pressure ◽  
Multiple Cracks ◽  
Pressure Hydrogen ◽  
In Situ Repair

In-Situ Repair of Multiple Cracks Present in the RTJ Groove of High Pressure Hydrogen Bearing DHDS Reactor by Welding

2012 ◽  
Vol 45 (2) ◽  
pp. 52
Author(s):  
Swapan Kumar Bagchi ◽  
Kaushik Boral ◽  
Amit Kumar Mishra
Keyword(s):  
High Pressure ◽  
Multiple Cracks ◽  
Pressure Hydrogen ◽  
In Situ Repair

scholarly journals In Situ High Pressure Hydrogen Tribological Testing of Common Polymer Materials Used in the Hydrogen Delivery Infrastructure

10.3791/56884 ◽  
2018 ◽  
Author(s):  
Edward R. Duranty ◽  
Timothy J. Roosendaal ◽  
Stan G. Pitman ◽  
Joseph C. Tucker ◽  
Stanley L. Owsley ◽  
...  
Keyword(s):  
High Pressure ◽  
Polymer Materials ◽  
Materials Used ◽  
Pressure Hydrogen

scholarly journals An in situ tribometer for measuring friction and wear of polymers in a high pressure hydrogen environment

2017 ◽  
Vol 88 (9) ◽  
pp. 095114 ◽  
Author(s):  
Edward R. Duranty ◽  
Timothy J. Roosendaal ◽  
Stan G. Pitman ◽  
Joseph C. Tucker ◽  
Stanley L. Owsley ◽  
...  
Keyword(s):  
High Pressure ◽  
Friction And Wear ◽  
Hydrogen Environment ◽  
Pressure Hydrogen

scholarly journals An in situ tensile test apparatus for polymers in high pressure hydrogen

2014 ◽  
Vol 85 (10) ◽  
pp. 105110 ◽  
Author(s):  
K. J. Alvine ◽  
T. A. Kafentzis ◽  
S. G. Pitman ◽  
K. I. Johnson ◽  
D. Skorski ◽  
...  
Keyword(s):  
High Pressure ◽  
Tensile Test ◽  
Test Apparatus ◽  
Pressure Hydrogen

scholarly journals In situ friction and wear behavior of rubber materials incorporating various fillers and/or a plasticizer in high-pressure hydrogen

2021 ◽  
Vol 153 ◽  
pp. 106627
Author(s):  
Wenbin Kuang ◽  
Wendy D. Bennett ◽  
Timothy J. Roosendaal ◽  
Bruce W. Arey ◽  
Alice Dohnalkova ◽  
...  
Keyword(s):  
High Pressure ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Friction And Wear Behavior ◽  
Pressure Hydrogen

scholarly journals Influence of Specimen Surface Roughness on Hydrogen Embrittlement Induced in Austenitic Steels during In-Situ Small Punch Testing in High-Pressure Hydrogen Environments

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1579
Author(s):  
Hyung-Seop Shin ◽  
Juho Yeo ◽  
Un-Bong Baek
Keyword(s):  
Surface Roughness ◽  
High Pressure ◽  
Hydrogen Embrittlement ◽  
Test Method ◽  
Austenitic Steels ◽  
Specimen Surface ◽  
Dominant Factor ◽  
Small Punch ◽  
Pressure Hydrogen

An in-situ small punch (SP) test method has recently been developed as a simple screening technique for evaluating the properties of metallic materials used in high-pressure hydrogen environments. With this method, the test conditions including temperature and gas pressure can easily be adjusted to those used in practice. In this study, specimens of STS316L steel and 18 wt% Mn steel were prepared at two different surface roughness, fabricated using wire-cutting and mechanical polishing. Their effects on hydrogen embrittlement (HE) were evaluated using in-situ SP testing at both room temperature and a lower temperature where HE was shown to occur under 10 MPa hydrogen. Both steels were evaluated using two variables obtained from in-situ SP testing, the SP energy, and the relative reduction of thickness (RRT), to quantitatively determine the effect of specimen surface roughness on HE susceptibility. Their fracture characteristics due to HE under 10 MPa hydrogen showed little difference with surface finish. Surface roughness had a negligible influence on these quantitative factors describing HE, indicating that it is not a dominant factor to be considered in in-situ SP testing when it is used to screen for HE compatibility in steels used in high-pressure hydrogen environments.

Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

2020 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Room Temperature ◽  
Growth Technique ◽  
Salt Hydrate ◽  
X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

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